PHOTO: Ninigret Pond Dredging and Marsh Restoration

J.F. Brennan Company, Inc., La Crosse, Wisconsin, working together with Coastal Resources Management Corporation (CRMC) and U.S. Fish and Wildlife Department, recently completed the Ninigret Pond dredging and marsh restoration project in Charlestown, R.I.

During the works, approximately 30,000 cubic yards of material was dredged from the breachway, adding between six vertical inches and a foot of sediment to the marsh. This enables plants like eelgrass to grow, and the marsh and pond to thrive. The dredging also deepened the breachway channel to improve navigation for boats that use the waterway.

The contractor dredged two sedimentation basins within the breachway channel. Sand was dredged using two eight-inch hydraulic dredgers and transported via pipeline back to the salt marsh and island. Specially equipped low ground pressure (LGP) CAT dozers and environmentally sensitive amphibious excavators placed the sand.

Using sand dredged from the channel, rather than trucking in materials, helped the contractor work more efficiently.

According to CRMC coastal policy analyst Caitlin Chaffee, “J.F. Brennan’s use of amphibious excavators minimizes the impact to vegetation in the marsh, and their impact on the marsh is really next to nothing.” 

After dredged materials were spread and graded, a variety of salt marsh grasses were planted. Over time, the grasses will cover the area, helping the marsh to recover.

 

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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